Estimation method and system for cyclic service life of chemical power source

Abstract

The invention provides an estimation method for the cyclic service life of a chemical power source. The estimation method comprises the steps that the heat potential energy state and the charge and discharge performance of a detected power source are detected in a pre-built test environment to obtain heat energy data and charge and discharge performance data of the detected power source; and the charge and discharge performance data and the heat energy data are substituted into a pre-built irreversible energy and tested power source cyclic service life model to obtain the cyclic service life of the detected power source, wherein the irreversible energy and tested power source cyclic service life model comprises a cyclic service life function built on the basis of the relation among the heat energy data, the performance data and the cyclic service life which are obtained in the test environment. Accordingly, the purposes of achieving 100% estimation and detection on the cyclic service life of various secondary chemical power sources formed by an electrochemical system before the power sources leave a factory and screening out the products of which the cyclic service life performanceis unqualified are achieved.

Description

technical field [0001] The invention relates to a method and system for estimating the cycle service life of a secondary chemical power source composed of an electrochemical system, in particular to a method and system for estimating the cycle service life of a chemical power source. Background technique [0002] As the application fields of lithium batteries become more and more extensive, its design capacity gradually increases, and the inconsistency of battery cells and different operating conditions make the service life of batteries vary greatly, and there are many factors for battery performance attenuation. The internal chemical reaction mechanism is relatively complex, making it difficult to estimate the battery life. [0003] At present, the method of measuring the cycle life of secondary chemical power is actual testing, and the individual sample data in the batch represent the performance of batch products or products with the same system and formula with some of ...

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Problems solved by technology

[0004] Its disadvantages are: 1. The samples after testing cannot be reused and no longer have use value, resulting in a waste of resources; 2. The representativeness of the data is poor, and the influence of product consistency cannot be ruled out, resulting in too much data deviation. 3. The test is not universal, and it is impossible to find products whose cycle life does not meet the standard before sale

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